Abstract: In a steady rest (1) for centering a rotationally symmetrical workpiece (2) in the space, consisting of: two housing halves (4, 5) arranged at a distance from one another and firmly connected together, a middle steady rest arm (6) arranged between the two housing shells (4, 5) that is mounted in the housing shells (4, 5) by means of an actuation piston (7) so as to be moved in an axial direction (3) towards the workpiece (2), and two outer steady rest arms (11, 12) that are in a driving connection with the middle steady rest arm (6) workpieces (2) with the largest possible diameters should be held centerd in the space by the steady rest (one), while retaining the greatest possible movement of travel of the actuation piston (7).

Abstract: A damping apparatus includes a contact roller provided to be rotatable about a rotation axis, a first support body by which the contact roller is rotatably supported, a second support body holding the first support body so that the rotation axis of the contact roller is parallel to an axis of a spindle, a drive mechanism driving the second support body to bring the contact roller into contact with a workpiece held by the spindle and to separate the contact roller from the workpiece, and a base supporting the second support body and the drive mechanism. The first support body is held by the second support body via an elastic rubber body.

Abstract: A fixture mechanism may include first and second outer plates, a central plate and first and second guide members. The second outer plate includes a first face facing the first outer plate. The second outer plate may include first and second guide channels and a guide-member recess. The guide channels may be fixed relative to the first outer plate. The central plate is movably disposed between the first and second outer plates. The central plate may slidably engage first and second gripping arms that are movable relative to the outer plates between a clamped position and a retracted position. The guide members may be received in the guide-member recess and may be movable relative to the second outer plate and relative to each other within the guide-member recess to adjust a position at which the workpiece will be clamped when the gripping arms are in the clamped position.

Abstract: An auto-centering apparatus of a steady rest has: a base part; a main support part installed on the top of the base part, and a loading unit installed on the top of the main support part; at least one side support part installed on the top of the base part and located at least one side of the main support part, and a loading unit installed on the top of the side support part; a lift-up module installed in the base part and coupled to the main support part; and a connecting unit installed between the main support part and the side support part.

Abstract: A steady rest for centering a rotationally symmetrical workpiece in a space comprises: two housing halves arranged at a distance from one another and connected together, a plate-shaped middle piece arranged between the two housing halves, the middle piece mounted in the housing halves by means of an actuator piston so it can be moved in an axial movement direction to the workpiece, two linear guide grooves disposed in both opposite end faces of the middle piece, with the linear guide grooves running in a cross-shaped arrangement and at an angle to the movement direction of the middle piece, two outer steady rest arms, each of which has its free ends mounted in each of the linear guide grooves of the middle piece in a movable arrangement, and a middle steady rest arm attached to the middle piece between the outer steady rest arms.

Abstract: It is an object of the present invention to provide a machine tool with a rest apparatus having high supporting stiffness of a workpiece by the rest apparatus and having flexibility to machine a plurality of kinds of the workpieces selectively and to provide a machining method of the machine tool with the rest apparatus. The machine tool with the rest apparatus comprising a base 10, a spindle head 20 mounted on the base 10 to hold rotatably one end of a workpiece W, a tail stock 30 mounted on the base 10 to be faced to the spindle head 20 and to hold rotatably the other end of the workpiece W, first rest apparatus 52 mounted between the spindle head 20 and the tail stock 30 and fixed to the base 10 un-movably to support the workpiece W, and second rest apparatus 53 mounted between the spindle head 20 and the tail stock 30 and movably mounted on the base 10 to support said workpiece W.

Abstract: A device and method for positioning and blocking steady rests for rolling milly cylinders in grinding machines and grinding machines employing the same. A positioning and blocking device for steady rests includes a substantially flat carriage including a translation mechanism and a blocking mechanism, wherein the blocking mechanism is magnetic.

Abstract: A steady rest for clamping of rod-shaped workpieces, the steady rest including three holding elements, including two outer holding elements adapted to be swivelled about a pin mounted in a housing and a middle holding element adapted to be adjusted axially, and in which coolant or lubricant can be carried to a workpiece by means of ducts in the housing and the middle holding element. The ducts provided in the housing and in the middle holding element, being connected to a cavity and the ducts being connected together by a deformable flexible high-pressure hose. The ducts being connected together by means of the elastically deformable element.

Abstract: A sensor system and a reverse clamp is provided. The reverse clamp may include a back portion, a first arm, and a second arm. The first and second arm extending from the back portion to form an opening configured to receive a cylindrical arm.

Abstract: Apparatus and method for converting a convention centerless grinding machine to a centerless grinding machine having a servo motor mounted inside the top slide using an internal servo motor bracket. The servo motor bracket is bolted to the spindle head assembly housing and is cantilevered into the top slide to allow required tilt adjustment of the regulating wheel with respect to the top slide while maintaining correct alignment of the servo motor with the regulating wheel spindle. The bracket includes slots allowing a servo motor belt tension to be adjusted. The tension adjustments are conveniently made through an existing opening in the top slide. Locating the servo motor inside the top slide using the internal servo motor bracket of the present invention significantly reduces conversion costs and servo motor maintenance otherwise required by the environment the centerless grinder is operated in, for example, oils and the presence of metal grindings.

Abstract: The invention relates to a grinding center for the simultaneous grinding of multiple main bearings and rod bearings and/or central sections of crankshafts (22). Two rod bearing grinding spindles (14, 15), wherein the first can be displaced only in the Z direction and the second can be minimally displaced only in the X direction, are mounted on a common rod bearing crosslide (11). In the final phase of the grinding, a correction of dimension deviation between the two machined rod bearings is carried out via a separate control of the second rod bearing grinding spindle (15), as a dimension or roundness correction. The deviations are detected by measuring devices.

Abstract: It is an object of the present invention to provide a machine tool with a rest apparatus having high supporting stiffness of a workpiece by the rest apparatus and having flexibility to machine a plurality of kinds of the workpieces selectively and to provide a machining method of the machine tool with the rest apparatus. The machine tool with the rest apparatus comprising a base 10, a spindle head 20 mounted on the base 10 to hold rotatably one end of a workpiece W, a tail stock 30 mounted on the base 10 to be faced to the spindle head 20 and to hold rotatably the other end of the workpiece W, first rest apparatus 52 mounted between the spindle head 20 and the tail stock 30 and fixed to the base 10 un-movably to support the workpiece W, and second rest apparatus 53 mounted between the spindle head 20 and the tail stock 30 and movably mounted on the base 10 to support said workpiece W.

Abstract: A device and method for positioning and blocking steady rests for rolling milly cylinders in grinding machines and grinding machines employing the same. A positioning and blocking device for steady rests includes a substantially flat carriage including a translation mechanism and a blocking mechanism, wherein the blocking mechanism is magnetic.

Abstract: A mechanism for suppressing grinding-cutting vibration comprises a C-shaped base, a fixed support seat, a clamp device and a vibration absorber. Based on vibration absorbing principle of the vibration theory, the clamp device is connected to the movable cutting machine, so as to move along with the cutting machine during the machining operation, and the clamp force applied to clamp the workpiece is adjustable. By such arrangements, the vibration energy produced at the time of cutting the workpiece can be transferred to the vibration absorber through the clamp device, and then a part of the vibration energy will be absorbed by the vibration absorber, thus achieving the objective of reducing vibration of the cut position.

Abstract: In a steady rest (1) with three holding elements (5, 6, 7), of which the two outer holding elements (6, 7) can be swivelled about articulated pins (8, 9) mounted in a housing (2) and the middle holding element (5) can be adjusted in a straight line, with one chip protection cap (11, 12) each provided with outlet ducts attached to one or both outer holding elements (6, 7) and with the possibility of supplying cooling or rinsing agent in a controlled fashion via ducts (13, 15) worked into the holding elements (6, 7) for application to the workpiece (10), each of the ducts (13, 15) provided in the outer holding elements (6, 7) is directly connected to a duct (27) running in the housing (2) of the steady rest (1) via kidney-shaped openings (21, 22) running concentrically to the articulated pins (8, 9).

Abstract: There is provided a workpiece support device for use in machining a workpiece including: a securing support unit; and a following support unit. The securing support unit has a securing abutment member releasably positioned and secured at a desired position, and the securing abutment member abuts against the workpiece at a portion near a portion to be machined to prevent said portion to be machined from moving against the secured securing abutment member. The following support unit has a following abutment member, and the following abutment member abuts against the workpiece at a portion near the portion to be machined on the same side as the securing abutment member, is movable following a movement of the workpiece, and applies a pressure to the workpiece during the movement.

Abstract: An improved steady rest assembly having a pair of opposed gripper arms that selectively open and close around a rotating cylindrical workpiece. One end of the gripper arms includes a workpiece-engaging member while the opposite end is pivotally coupled to a stationary base portion. Each gripper arm has a precision cut camming groove located between the two ends. A linearly translating yoke carries a third workpiece-engaging member and a pair of camming pins that slidably mates with these camming grooves to open and close the gripper arms. As the yoke moves toward a workpiece, the three workpiece-engaging members close around and center the workpiece.

Abstract: A method of machining a disk for a toroidal-type continuously variable transmission, has the steps of fixing a disk to a core bar having a pair of reference portions for rotation at both end thereof, clamping the reference portions by a first center and a second center opposing the first center, abutting a first flat surface portion formed on one side surface of the disk against a reference for axial abutment, machining a first traction surface formed on another side surface of the disk, inverting the disk with the disk fixed to the core bar, clamping the pair of reference portions by the first center and the second center, abutting a second flat surface portion formed on the other side surface of the disk against the reference for axial abutment and machining a second traction surface formed on the one side surface of the disk.

Abstract: The invention relates to a device for grinding rollers, also for grinding hollow rollers. As the rollers tend to vibrate transversally as a result of the contact with the grinding disc, a cushioned body is applied to the opposite side of the roller from the grinding disc, said body being engaged pneumatically against the roller and adapting at least partially to the contours of the roller. The cushioned body consists of an elastic solid material or an elastic external skin that is filled with an elastic pressurized medium. The engagement pressure of the cushion is adjustable. This is achieved by a pneumatic advance cylinder located on a base, said cylinder having a piston that can be impinged on both sides and that bears on its piston rod a fixing plate comprising the elastic cushion. The advance cylinder is connected to compressed air conduits, P indicating the conduit comprising a pressure regulator and L indicating the return conduit in the standard case.

Abstract: A steady rest having separate adjusting screws for adjusting the clamping positions of three workpiece engaging rollers either horizontally or vertically.

Abstract: A steady rest having cams for adjusting both vertical and the horizontal position of the centerline of a cylindrical workpiece.

Abstract: A turbine component such as a turbine blade is clamped into a fixture having a base upon which a remainder of the fixture is supported and a stop which limits the movement of the turbine component. The fixture further has two clamp arms affixed to the base and which controllably clamp against one pair of the pressure surfaces of the root to force the turbine component against the stop, which preferably is contacted by another pair of the pressure surfaces of the root. When the turbine component is clamped in this position, its root may be readily shaped as by grinding.

Abstract: A forming apparatus includes a workbench and a pivot device. The pivot device includes a pivot plate (40) and a fixed plate (60). The pivot plate is fixed below the workbench, and rotatably seated on the fixed plate. The fixed plate defines two cutouts (66) respectively in two corners thereof, to form an arched-shaped top portion (61). Three locking plates (70) are attached on side walls (42, 46) of the pivot plate. When the locking plates are oriented vertically, they can pass over the two corners corresponding to the cutouts but cannot pass over other corners of the fixed plate. When the locking plates are oriented horizontally, they can pass over every corner of the fixed plate. By adjusting orientations of the locking plates, the combined base and pivot plate can be rotated within a variety of predetermined different angles.

Abstract: A steady rest having cams for adjusting both vertical and the horizontal position of the centerline of a cylindrical workpiece.

Abstract: A holding strip is used to hold a semiconductor ingot during semiconductor wafer fabrication. The holding strip is formed from a semiconductor material, typically the same material used to form the ingot itself. The holding strip has a holding surface shaped to receive the ingot and at least one surface other than the holding surface, into which at least one notch is formed. The holding strip has a characteristic breaking strength that changes when a cut is formed through the holding surface and into the notch. In some embodiments, the notch has sides that are substantially parallel to each other, and in other embodiments, the notch has tapered sides. In alternative embodiments, the shape of the notch causes an abrupt change or a gradual change in the breaking strength of the holding strip as the cut penetrates into the notch. In either case, the notch can be shaped to cause a gradual change in breaking strength as the cut moves deeper into the notch.

Abstract: This invention is related to a steady rest, which employs a pair of parallel, sliding, linear moving clamping bars for moving wear pads or rollers toward a workpiece.

Abstract: A workpiece and a grinding wheel are rotated and the grinding wheel is moved in a direction parallel to the rotational axis of the workplace so as to grind a cylindrical surface of the workpiece. After a part of the cylindrical surface is ground, a rest device is advanced towards the workpiece so as to support the part of the cylindrical surface of the workpiece which has been ground. Under the condition, the remaining portion of the cylindrical surface of the workpiece is ground.

Abstract: A floating rotary drive device sequentially holding a workpiece of a series of workpieces to be supported with slack while each workpiece is machined by grinding while the workpiece is rotated about a slack axis of rotation, comprising a motor having n output shaft, a chuck (2) rotatable about an axis of rotation which chuck is attached to the output shaft of the motor (9), by a flexible control (30) and positioning means for positioning the machined workpiece after it has been ground, characterized in that the device comprises: coupling means (14, 39; 15, 40) for automatic coupling of the workpiece to be ground with the chuck; the coupling means being actuatable at the end of a machining operation to bear against the chuck to center the chuck with its axis of rotation coincident with the specific axis of rotation of the machined workpiece in a final position and to immobilize the chuck in the final position during the removal of the machined workpiece and during the fitting of a sequential workpiece to be ma

Abstract: A dynamic steady rest particularly adapted for use in supporting a rotating workpiece during a grinding operation. The steady rest includes a lever assembly pivotally mounted on a base and having a workpiece support arm and a counterweight arm. Weights are adjustably secured to the counterweight arm and bias the support arm upwardly and into supporting engagement with the rotating workpiece. The steady rest further includes two dashpots pivotally secured between the base and the support arm to dampen the motion of the support arm.